FHD - DUPLEX

Product catalog summary

Introduction
The document outlines the technical specifications and guidelines for the FHD series high-pressure filters, capable of handling up to 350 bar pressure and a flow rate of 345 l/min. These filters are designed for high-pressure applications and are made from phosphatized cast iron and steel.

Filter Sizing and Corrective Factors
Proper filter sizing is essential and should consider the variable pressure drop based on the application. For return filters, the pressure drop should range between 0.4 - 0.6 bar. The total pressure drop is the sum of the housing and filter element pressure drops, influenced by fluid density and viscosity. Corrective factors are applied for different viscosities and filter media.

Technical Data

Maximum Pressure: 350 bar
Flow Rate: 345 l/min
Temperature Range: -25 °C to +110 °C
Bypass Valve Opening Pressure: 600 kPa (6 bar)
Filter Elements: Options include microfibre and wire mesh with various pressure ratings
Seals: Standard NBR and optional FPM

Application Example
An example is provided for selecting a top tank return filter with a flow rate of 120 l/min and a viscosity of 46 mm2/s. The MPT series, size 100, is recommended for this flow rate.

Pressure Drop and Graphs
The document includes graphs showing pressure drop curves for different filter models and configurations, using mineral oil with a density of 0.86 kg/dm3. These graphs illustrate how pressure drop varies with flow rate.

Ordering Information
A detailed ordering code system is provided for selecting the appropriate filter configuration, including element series, length, seals, filtration rating, and additional features like differential indicators.

Conclusion
The FHD series filters are robust solutions for high-pressure applications, offering customizable options to meet specific operational needs. Proper sizing and selection are crucial for optimal performance and efficiency.

High Pressure Filters Overview
This section provides detailed specifications and configurations for high-pressure filters, specifically models FHD051, FHD326, and FHD333. It includes information on dimensions, connections, filter elements, and accessories.

Specifications

Dimensions: Lists the height (H) in millimeters for different filter lengths, along with recommended clearance space for maintenance.
Connections: Specifies various connection types, including G1, G2, G3, and others, with corresponding thread sizes.
Valves: Options include without bypass (S) and with bypass at 6 bar (B).

Filter Elements

Filtration Ratings: Filters use inorganic microfiber with ratings of 3 µm, 6 µm, and 10 µm, and wire mesh with a 25 µm rating.
Element ∆p: Pressure drop options are 20 bar and 210 bar.

Ordering and Configuration

Complete Filter: Designation codes for ordering include execution types (P01 for standard, Pxx for customized) and seal types (A for NBR, V for FPM).
Filter Element: Length options range from 1 to 5, with specific configurations for each series and size.

Accessories

Additional Features: Includes T2 plug and various differential indicators (DEA, DLA, DEM, etc.) for monitoring filter performance.

Spare Parts

Order Numbers: Spare parts are listed with specific order numbers for different filter series and seal kits.

Catalog excerpts

High Pressure filters Maximum pressure up to 350 bar - Flow rate up to 345 l/min High Pressure filters

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FILTER SIZING Corrective factor FILTER SIZING Corrective factor The correct filter sizing have to be based on the variable pressure drop depending by the application. For example, for the return filter the pressure drop have to be in the range 0.4 - 0.6 bar. Corrective factor Y, to be used for the filter element pressure drop calculation. The values depend to the filter size and lenght and to the filter media. Reference viscosity 30 mm2/s The pressure drop calculation is performed by adding together the value of the housing with the value of the filter element. The pressure drop in the housing...

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Corrective factor FILTER SIZING Corrective factor Y, to be used for the filter element pressure drop calculation. The values depend to the filter size and lenght and to the filter media. Reference viscosity 30 mm2/s Suction filters Low & Medium pressure filters Filter element Return / Suction filters Filter element Filter element

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Corrective factor Y, to be used for the filter element pressure drop calculation. The values depend to the filter size and lenght and to the filter media. Reference viscosity 30 mm2/s Stainless steel high pressure filters Filter elemen Filter element Filter element Filter element

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Selection Software FILTER SIZING Step Select “FILTERS” Choose filter group (Return Filter, Pressure Filter, etc.) Choose filter type (MPF, MPT, etc.) in function of the max working pressure and the max flow rate Push “PROCEED” Insert all application data to calculate the filter size following the sequence: - working pressure - working flow rate - working pressure drop - working temperature - fluid material and fluid type - filtration media - connection type Push “CALCULATE” to have result; in case of any mistake, the system will advice which parameter is out of range to allow to modify/adjust...

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High Pressure filters

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High Pressure filters Maximum pressure up to 350 bar - Flow rate up to 345 l/min High Pressure filters

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High Pressure filters Maximum pressure up to 350 bar - Flow rate up to 345 l/min Filter housing materials - Head: Phosphatized cast iron - Housing: Phosphatized steel - Bypass valve: Steel Pressure - Working pressure: 35 MPa (350 bar) - Test pressure: 52.5 MPa (525 bar) - Burst pressure: 105 MPa (1050 bar) - Pulse pressure fatigue test: 1 000 000 cycles with pressure from 0 to 35 MPa (350 bar) Bypass valve - Opening pressure 600 kPa (6 bar) - Other opening pressures on request. Ap element type - Microfibre filter elements - series R: 20 bar - Microfibre filter elements - series H: 210 bar (only...

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The curves are plotted using mineral oil with density of 0.86 kg/dm3 in compliance with ISO 3968. Pressure drop Ap va ries proportionally with density. Filter housings; /Ap pressure drop Bypass valve pressure drop TT 5°7J High Pressure filters

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COMPLETE FILTER Filtration rating (filter media] A03 Inorganic microfiber 3 fim A06 Inorganic microfiber 6 fim A10 Inorganic microfiber 10 fim Filtration rating P01 MP Filtri standard Pxx Customized FILTER ELEMENT Element series and size Element length Filtration rating (filter media] A03 Inorganic microfiber 3 fim A06 Inorganic microfiber 6 fim A10 Inorganic microfiber 10 fim Filtration rating P01 MP Filtri standard Pxx Customized Differential indicators page DEA Electrical differential indicator517 DEM Electrical differential indicator517-518 DLA Electrical / visual differential indicator518-519 DLE...

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Recommended clearance space for maintenance High Pressure filters

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FHD FHD051 - FHD326 - FHD333 Designation & Ordering code COMPLETE FILTER Series and size Configuration example: Without bypass With bypass 6 bar Filtration rating (filter media) A03 Inorganic microfiber A06 Inorganic microfiber A10 Inorganic microfiber A16 Inorganic microfiber A25 Inorganic microfiber M25 Wire mesh P01 MP Filtri standard Pxx Customized FILTER ELEMENT Configuration example: Element series and size FHD051 Element length Filtration rating (filter media) A03 Inorganic microfiber A06 Inorganic microfiber A10 Inorganic microfiber A16 Inorganic microfiber A25 Inorganic microfiber M25...

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